/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.transaction.UserTransaction;
import sessionbean.MediaSessionBean;
import sessionbean.MediaSessionBeanLocal;
import sessionbean.UserSessionBeanLocal;

/**
 *
 * @author Phan Van Duong
 */
public class MediaController extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {            
            Context context = new InitialContext();
            Object ref = context.lookup("MediaSessionBeanLocalJNDI");
            MediaSessionBeanLocal mediaLocal = (MediaSessionBeanLocal) ref;
            UserTransaction utx=(UserTransaction) context.lookup("UserTransaction");
            String task = request.getParameter("task");
            if(task.equals("viewAll")){                
                utx.begin();
                request.setAttribute("MEDIAS",mediaLocal.viewAll());
                RequestDispatcher rp=request.getRequestDispatcher("showMedia.jsp");
                rp.forward(request, response);
                utx.commit();
            } else if(task.equals("showMediaDetail")){
                int mediaId=Integer.parseInt(request.getParameter("mediaId"));                
                utx.begin();
                request.setAttribute("MEDIADETAIL",mediaLocal.getMedias(mediaId));
                RequestDispatcher rp=request.getRequestDispatcher("mediaDetail.jsp");
                rp.forward(request, response);
                utx.commit();
            } else if(task.equals("searchMedia")){
                String text=request.getParameter("txtMedia");
                utx.begin();
                request.setAttribute("MEDIAS",mediaLocal.searchMedia(text));
                RequestDispatcher rp=request.getRequestDispatcher("showMedia.jsp");
                rp.forward(request, response);
                utx.commit();
            }
            
        } catch (Exception e) {
            e.printStackTrace();
        } finally{
            out.close();
        }

    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
